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Xcite selected conceptual design to develop UK North Sea Bentley

XER to combine Teekay-Sevan FSO with Arup Platform

The Aberdeen-based Xcite Energy Resources Limited (Xcite or XER) company selected the conceptual design to develop its heavy crude oil field, Bentley offshore the Shetland Islands in the UK North Sea in combining a Teekay Sevan-type floating storage and offloading (FSO) vessel together with Arup ACE steel frame platform.

Bentley was discovered in 1977 but was left undeveloped because of its 10°- 12° API heavy crude oil throwing the production costs onto the upper level while the expected recovery rate remains uncertain.

Located 160 kilometers east of the Shetland Islands, Bentley belongs to the same basin as Statoil-operated Bressay, eight kilometers in the north, as Enquest-operated Kraken, fifteen kilometers west, and BP-operated Bruce field, twenty kilometers south-west.

As part of the Block 9/3b, Xcite was granted from a first licence as sole owner and operator in 2003.

Xcite_Bentley_Teekay-Sevan_FSO_Amec-Arup_Platform_MapSince then Xcite implemented an exploratory and drilling program up to 2012 in order to evaluate Bentley actual reserves and define the optimized strategy to develop it.

As the first wells drilled in Bentley confirmed the nature of the heavy crude oil, understanding its combination with the associated gas and water was the preliminary requiste to further investment.

During this exploratory campaign, Xcite tested all the processes required for such heavy crude including:

 – Oil – gas – water separation

 – Demulsifier and defoamer

 – Preparation and injection of the chemicals and diluents

 – Downhole heating

 – Pipeline flow assurance

 – Crude oil blending

 As a result of this campaign of tests, Xcite estimated to the recoverable reserves (2P) in Bentley to 257 million barrels of oil out of the 909 million in-place reserves.

Xcite signed MOU with AMEC and Arup for Bentley

In order to optimize costs and first production, Xcite opted for a development in phases, Bentley North, Bentley West and Bentley East-South.

For the Bentley Phase-1, Xcite signed in April 2014 series of Memorandum of Understanding (MOU) with key partners to provide costs competitive solutions, with:

Xcite_Bentley_Teekay-Sevan_FSO_Amec-Arup_Platform – Teekay Shipping Norway AS (Teekay) for the supply of a cylindrical Sevan-type FSO

 – Ove Arup Partners (Arup) for the design and construction of a self-installing steel ACE platform

 – Amec for the management, engineering, procurement, construction and installation

In this concept, the Sevan FSO will be bridged to the Arup ACE steel frame platform equipped with 20 slots with 4-5 laterals per well.

Xcite and TeekaySevan will work together to carry out the front end engineering and design (FEED) of the FSO, then to implement the construction and installation.

According to the MOU, Teekay will continue to support Xcite for the operation and maintenance.

This Sevan FSO is due to stand on Bentley during all the phases that Xcite has planned to develop this field and anticipated expansions.

In signing the MOUs with Arup and Amec, Xcite intends to adjust the basic design of its ACE steel platform to Bentley requirements in respect with the multiples processes to be integrated in the topsides.

Because of its self-elevated design, the Arup ACE plaform is easy to tow, install, operate and decommission.

Even if Bentley appears as a complex heavy crude oil offshore field, the MOU signed with TeekaySevan for the FSO and the tandem AmecArup for the ACE platform will give the opportunity to Xcite to start the first phase on fast-track for a first production expected in by 2017 and to last 35 years.

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